
/*
 * Copyright 2011 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
#include "SampleCode.h"
#include "SkCanvas.h"
#include "SkPaint.h"
#include "SkView.h"

#include "SkBlurMaskFilter.h"
#include "SkColorMatrixFilter.h"
#include "SkDiscretePathEffect.h"
#include "SkGradientShader.h"

#include "SkEdgeClipper.h"

static void test_edgeclipper()
    {
    SkPoint pts[] =
        {
            { -8.38822452e+21f, -7.69721471e+19f },
            { 1.57645875e+23f, 1.44634003e+21f },
            { 1.61519691e+23f, 1.48208059e+21f },
            { 3.13963584e+23f, 2.88057438e+21f }
        };
    SkRect clip = { 0, 0, 300, 200 };

    SkEdgeClipper clipper;
    clipper.clipCubic(pts, clip);
    }

///////////

//#define COLOR 0xFFFF8844
#define COLOR 0xFF888888

static void paint_proc0(SkPaint* paint)
    {
    }

static void paint_proc1(SkPaint* paint)
    {
    paint->setMaskFilter(SkBlurMaskFilter::Create(2,
                         SkBlurMaskFilter::kNormal_BlurStyle))->unref();
    }

static void paint_proc2(SkPaint* paint)
    {
    SkScalar dir[3] = { 1, 1, 1};
    paint->setMaskFilter(
        SkBlurMaskFilter::CreateEmboss(dir, 0.1f, 0.05f, 1))->unref();
    }

static void paint_proc3(SkPaint* paint)
    {
    SkColor colors[] = { SK_ColorRED, COLOR, SK_ColorBLUE };
    SkPoint pts[] = { { 3, 0 }, { 7, 5 } };
    paint->setShader(SkGradientShader::CreateLinear(pts, colors, NULL, SK_ARRAY_COUNT(colors),
                     SkShader::kMirror_TileMode))->unref();
    }

static void paint_proc5(SkPaint* paint)
    {
    paint_proc3(paint);
    paint_proc2(paint);
    }

typedef void (*PaintProc)(SkPaint*);
const PaintProc gPaintProcs[] =
    {
    paint_proc0,
    paint_proc1,
    paint_proc2,
    paint_proc3,
    paint_proc5,
    };

///////////////////////////////////////////////////////////////////////////////

class EffectsView : public SampleView
    {
    public:
        SkPath fPath;
        SkPaint fPaint[SK_ARRAY_COUNT(gPaintProcs)];

        EffectsView()
            {
            size_t i;
            const float pts[] =
                {
                0, 0,
                10, 0,
                10, 5,
                20, -5,
                10, -15,
                10, -10,
                0, -10
                };
            fPath.moveTo(pts[0], pts[1]);
            for (i = 2; i < SK_ARRAY_COUNT(pts); i += 2)
                {
                fPath.lineTo(pts[i], pts[i+1]);
                }

            for (i = 0; i < SK_ARRAY_COUNT(gPaintProcs); i++)
                {
                fPaint[i].setAntiAlias(true);
                fPaint[i].setColor(COLOR);
                gPaintProcs[i](&fPaint[i]);
                }

            test_edgeclipper();
            SkColorMatrix cm;
            cm.setRotate(SkColorMatrix::kG_Axis, 180);
            cm.setIdentity();

            this->setBGColor(0xFFDDDDDD);
            }

    protected:
        // overrides from SkEventSink
        virtual bool onQuery(SkEvent* evt)
            {
            if (SampleCode::TitleQ(*evt))
                {
                SampleCode::TitleR(evt, "Effects");
                return true;
                }
            return this->INHERITED::onQuery(evt);
            }

        virtual void onDrawContent(SkCanvas* canvas)
            {
            canvas->scale(3, 3);
            canvas->translate(10, 30);
            for (size_t i = 0; i < SK_ARRAY_COUNT(fPaint); i++)
                {
                canvas->drawPath(fPath, fPaint[i]);
                canvas->translate(32, 0);
                }
            }

    private:
        typedef SampleView INHERITED;
    };

///////////////////////////////////////////////////////////////////////////////

static SkView* MyFactory()
    {
    return new EffectsView;
    }
static SkViewRegister reg(MyFactory);
